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Finding the Fourth Proportional to 705.23, 1,057.98 and 218.31

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Solution

The fourth proportional to 705.23, 1,057.98 and 218.31 is: 327.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.23 : 1,057.98 = 218.31 : x
  2. Step 2: Convert to fraction form
    705.23/1,057.98 = 218.31/x
  3. Step 3: Cross multiply
    705.23x = 1,057.98 × 218.31
  4. Step 4: Simplify right side
    705.23x = 230,967.61
  5. Step 5: Solve for x
    x = 230,967.61/705.23
  6. Step 6: Final answer
    x = 327.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.